some of my best shots have come with the 14mm f/2.5, this is my goto lens for car shows and most daytime shots.

the 14mm is a gem, and can be had on the cheap.

I used my 100-300 on one job, and then never had necessity or inclination to use it again. The Sigma 50-500 wholly supplanted it.

It's a fine lens, but for my uses wasn't worth it.

Nice job of selective editing. I said "To me" they're not worth it, after saying this is a highly subjective question.

__________________
I'm not lazy. I'm energy efficient.

I suspect that your point is well understood. It's all opinion anyway.

The voitlander 25mm F0.95 is a wonderful lens but its certainly not for everybody. I enjoy it and I'm not making money with my photography. This is a very subjective thing. People love the 45 1.8 and it is a great lens, I just don't like the focal length as much. SO really the lenses that are worth avoiding are.........the ones you don't like :P

Thread hijacking time....how is focusing and image quality on the Bigma? Do you use it on an m43 body or an old 4/3 dSLR? Thanks.

I haven't found a M43 lens yet that did not meet my expectations, although some seem priced a bit high for what they are. The Olympus 17mm was my first prime and I learned so much about composition and finding good light with it. I sold it to help fund my Panasonic 14mm and 20mm lenses. I still regret the decision even though the replacements are optically much better. The focal length of the 17mm felt natural to me. The 20mm is not wide enough and the 14mm is too wide.

Another example is my Panasonic Leica 45mm. The lens is beautiful and beyond reproach, but after only a month of ownership I find I never use it. It is a very expensive lens to store and I am considering selling it. Nothing wrong with the lens; it has exceeded all of my expectations.

Short version: All M43 lenses I have used had positives that outweighed the negatives, but some just didn't work for me. We are lucky to have such a diverse selection. The lenses that work for one shooter are probably not the same lenses that work for another.

Lee

Kind of a silly thread, as this is a hugely subjective question, but one thing that sort of gets highlighted is how solid the m4/3 lens lineup is. No real slouches in there. Some very good high value options, and some higher end stuff that is exceptional.

True ... sort of. If you get one without the double-image issue, then it can be a great little lens (for the right application, of course.) So, either buy it used from someone that you trust and has verified that it doesn't have the issue, or buy it from someplace like Amazon that has an easy return/exchange policy.

__________________
Olympus E-M5, 45/1.8
Lumix 14/2.5, 20/1.7, 25/1.4, 45/2.8, 14-42mm X, 14-45mm, 45-175mm X
Minolta MD 50/1.4, 85/2, 135/2.8

Pretty much this. There isn't anything that is terrible enough to avoid, but everything is some kind of trade off for something else. It just depends on how you shoot and what your goal is.

Now that I think about it, taking 3rd party lenses out of the equation, has there been any lens that has been universally hated and despised (on any system natively, as of late)? I mean, some we might find useless or overlapping.. but is there anything that seriously is a "do NOT buy this lens!"?